The key difference between SEM and SEO is SEM focuses on paid ads to drive traffic, while SEO involves optimizing a website to increase organic search traffic. En el mundo del SEO podemos distinguir diferentes "escuelas", ya que hay muchas técnicas posibles para mejorar el posicionamiento de una web. https://bookmarkity.com/story17780799/indicadores-sobre-marketing-engine-search-campaigns-que-debe-saber